I don't want to comment too much on this discussion, though I find it very interesting. So I have two quick points.
One drive it before you disregard it. It is quite impressive and I have driven an SVT 2.5 powered Focus for comparison.
Second some info to digest Size/Space concerns.
Contour
Front Headroom: 39 in. Rear Headroom: 35 in. Front Shoulder Room: 53.9 in. Rear Shoulder Room: 53.9 in. Front Hip Room: 50.7 in. Rear Hip Room: 45.5 in. Front Leg Room: 43 in. Rear Leg Room: 25 in. Maximum Luggage Capacity: 13.9 cu.ft. Maximum Seating: 4
ZX3
Front Headroom: 39.3 in. Rear Headroom: 38.7 in. Front Shoulder Room: 53.7 in. Rear Shoulder Room: 53.5 in. Front Hip Room: 49.4 in. Rear Hip Room: 49.5 in. Front Leg Room: 43.1 in. Rear Leg Room: 37.6 in. Maximum Luggage Capacity: 18.5 cu.ft. Maximum Cargo Capacity: NA Maximum Seating: 4